| Military branches | United States Armed Forces: US Army, US Navy (includes Marine Corps), US Air Force, US Coast Guard; note - Coast Guard administered in peacetime by the Department of Homeland Security, but in wartime reports to the Department of the Navy (2017) |
| Military service age and obligation | 18 years of age (17 years of age with parental consent) for male and female voluntary service; no conscription; maximum enlistment age 42 (Army), 27 (Air Force), 34 (Navy), 28 (Marines); 8-year service obligation, including 2-5 years active duty (Army), 2 years active (Navy), 4 years active (Air Force, Marines); all military occupations and positions open to women (2016) |
| Military expenditures | 3.3% of GDP (2015) 3.51% of GDP (2014) 3.83% of GDP (2013) 4.24% of GDP (2012) 4.58% of GDP (2011) |
Source: CIA World Factbook
This page was last updated on July 9, 2017
